What can I say?
It's a Grigri, the end-all be-all of autolocking belay devices. Contrary to other reviews, I have had no problem feeding rope to a leader, and contrary to Petzl, it will hold a 10.0 rope just fine. The only thing is that both climber and belayer HAVE to make sure it's threaded the right way. It's not a safety shortcoming, just do it right. I have a friend in the hospital with two shattered ankles right now from a Grigri threaded wrong. That said, it is an amazing device, easy to feed, easy to lower, easy to ascend, etc. There's a reason they haven't changed the design in 12 years.